Method for forming button, and button

Abstract

Provided is a method for forming a button, wherein the button can be formed from a relatively thin metal plate, and the button does not damage thread used for attaching the button to fabric. When forming a metal button (10, 20, 30) that will be attached to fabric (1, 1') with thread (2, 2'), four thread holes (13, 23, 33) are opened by passing four hole opening pins (42) that each have a quadrangular pyramid-shaped tip (42a) through a center part (11') of a plate-shaped intermediate member (10') that will become a button (10, 20, 30); said passing is done through the center part (11') from the front side to the rear side of the same. Said opening of the thread holes (13, 23, 33) forms everted parts (14') that protrude out from around the periphery of the thread holes (13, 23, 33) on the rear side. Four of said everted parts (14') are formed around the periphery of each thread hole at intervals of 90°, by the four pyramidal surfaces (42a") between the ridges (42a') on the tip (42a) of each hole opening pin (42). Next, on the rear side of the center part (11'), the button (10, 20, 30) is completed by bending each everted part (14') outward in the radial direction of the thread hole, from the base side to the tip side.

Description

technical field [0001] The present invention relates to a method for forming a button and a button, and more specifically, to a button made of metal of the type that can be attached to cloth with a thread, and a method for forming the button. Background technique [0002] In the case of using a metal plate to form a button to be attached to clothes or the like with a thread, it is necessary to provide a thread hole through which the thread passes through the metal plate. As a method of forming a threading hole in a metal plate, a method of penetrating a metal plate with a pin having a conical front end, as disclosed in JP-A-8-131214, cutting a metal plate to form slices, Next, a method of bending the cut piece toward the reverse side of the metal plate. Compared with the former, the latter has a larger number of steps, the processing of the threading hole is troublesome, and the shape of the threading hole is practically limited to a shape other than a circle such as a cres...

AI Technical Summary

Problems solved by technology

However, when the metal plate is relatively thin (for example, the thickness is 0.5 mm or less), it is impossible to remove the warped part and form a chamfer (refer to the conventional technology of the above-mentioned Japanese Patent Application Laid-Open No. 8-131214), and the It is difficult to bend if the warped part is too small

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